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Toppu

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Toppu completed
Toppu completed

Particulars

Owner: Hokkaido Prefecture

Designer: Nippon Koei Co. Ltd.

Contractor: Nishimatsu Construction Co Ltd, Iwata Chizaki Inc.

Statistics

Type: Gravity

Purpose(s): Flood Control / Irrigation / Water Supply

Reservoir capacity: 36 m3x106

Height: 78 metres

Length: 309 metres

Volume of RCC: 440 m3x103

Total volume: 530 m3x103

Construction Dates

Start of Project: 07/02 (July 2002)

Start of RCC: 06/05 (June 2005)

End of RCC: 10/08 (October 2008)

End of Project: 03/14 (March 2014)

Country: Japan

River: Toppu

DMS Co-ordinates: 43˚35'48.85"N, 141˚37'07.70"E

DD Co-ordinates: 43.596905, 141.618805

Facings

Upstream

SlopeType
VerticalTraditional concrete against formwork
0.80Traditional concrete against formwork

Downstream

SlopeType
0.80Traditional concrete against formwork

Spillway

SlopeType
0.80Traditional concrete against formwork

Placement

Layers (mm)Lifts (mm)
2501000

Cementitious material

Cement (kg/m3)
84
Pozzolan (kg/m3)Pozzolan Type
36Low-lime flyash (ASTM Class F)